There exist specially thick Chinese cash coins which are two to over five times thicker than that of normal coin. These coins are not for general circulation. Some of them may be either mother coins or specimen coins. The purpose of the others are unknown.
中國古錢中有一類特厚錢, 它們比普通錢厚二至五倍以上．它們一部份是母錢或樣錢，至於其他的用途則不明．
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在各標題上按滑鼠左鍵進入各項目的內容
Under Construction 在建造中
The follwoing figures are not drawn in scale (下列各圖並不按比例)
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